升级到ubuntu-16.04后，发现Git-review代码报错：
Unable to negotiate with 10.140.110.77 port 29418: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
ssh -p 29418 username@seaver_addr
Unable to negotiate with 192.168.1.101 port 29418: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
解决：修改~/.ssh/config，加入：
Host *
KexAlgorithms +diffie-hellman-group1-sha1